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답안 #824115

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
824115 2023-08-13T14:28:27 Z 8pete8 Mergers (JOI19_mergers) C++14
100 / 100
 823 ms 141424 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<pii,int>
#define pb push_back
#define all(x) x.begin(),x.end()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define p push
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
const int mxn=5*1e5,mod=998244353,lg=19;
void setIO(string name) {
	ios_base::sync_with_stdio(0); cin.tie(0);
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
int ans=0;
int pa[mxn+10],sz[mxn+10],up[mxn+10][lg+2],h[mxn+10];
vector<int>adj[mxn+10];
int find(int u){
    if(u==pa[u])return u;
    return pa[u]=find(pa[u]);
}
void merg(int u,int v){
    int a=find(u),b=find(v);
    if(a==b)return;
    if(sz[a]>sz[b]){
        pa[b]=a;
        sz[a]+=sz[b];
        return;
    }
    pa[a]=b;
    sz[b]+=sz[a];
}
int st[mxn+10],un[mxn+10];
vector<int>s[mxn+10];
void solve(int cur,int p){
    for(auto i:adj[cur]){
        if(i==p)continue;
        up[i][0]=cur;
        h[i]=h[cur]+1;
        solve(i,cur);
    }
}
int lca(int u,int v){
    if(h[u]<h[v])swap(u,v);
    int k=h[u]-h[v];
    for(int i=0;i<=30;i++)if(k&(1<<i))u=up[u][i];
    if(u==v)return u;
    for(int i=lg;i>=0;i--)if(up[u][i]!=up[v][i])u=up[u][i],v=up[v][i];
    return up[u][0];
}
void solve2(int cur,int p){
    int g=un[cur];
    for(auto i:adj[cur]){
        if(i==p)continue;
        solve2(i,cur);
        if(un[i]){
            un[cur]=lca(un[cur],un[i]);
            merg(st[cur],st[i]);
        }
    }
    if(un[cur]==cur)un[cur]=0;
}
int deg[mxn+10];
int32_t main(){
    //setIO("pieaters");
    fastio
    int n,m;cin>>n>>m;
    for(int i=0;i<n-1;i++){
        int u,v;cin>>u>>v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    h[0]=INT_MAX;
    for(int i=1;i<=n;i++)cin>>st[i],s[st[i]].pb(i);
    for(int i=1;i<=m;i++)pa[i]=i,sz[i]=1;
    solve(1,-1);
    for(int i=1;i<=lg;i++)for(int j=1;j<=n;j++)up[j][i]=up[up[j][i-1]][i-1];
    for(int i=1;i<=m;i++){
        int node=-1;
        for(auto j:s[i]){
            if(node==-1)node=j;
            else node=lca(node,j);
        }
        for(auto j:s[i])un[j]=node;
    }
    solve2(1,-1);
    int ans=0;
    for(int i=1;i<=n;i++)st[i]=find(st[i]);
    for(int i=1;i<=n;i++)for(auto j:adj[i])if(st[i]!=st[j])deg[st[j]]++;
    for(int i=1;i<=n;i++)if(deg[i]==1)ans++;
    cout<<(ans+1)/2;
}

Compilation message

mergers.cpp: In function 'void solve2(int, int)':
mergers.cpp:71:9: warning: unused variable 'g' [-Wunused-variable]
   71 |     int g=un[cur];
      |         ^
mergers.cpp: In function 'void setIO(std::string)':
mergers.cpp:31:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mergers.cpp:32:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 11 ms 23836 KB Output is correct
4 Correct 11 ms 23788 KB Output is correct
5 Correct 11 ms 23832 KB Output is correct
6 Correct 10 ms 23832 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 11 ms 23840 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23824 KB Output is correct
14 Correct 11 ms 23832 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23828 KB Output is correct
17 Correct 10 ms 23832 KB Output is correct
18 Correct 10 ms 23764 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 9 ms 23816 KB Output is correct
21 Correct 10 ms 23832 KB Output is correct
22 Correct 10 ms 23792 KB Output is correct
23 Correct 10 ms 23848 KB Output is correct
24 Correct 10 ms 23836 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 11 ms 23836 KB Output is correct
4 Correct 11 ms 23788 KB Output is correct
5 Correct 11 ms 23832 KB Output is correct
6 Correct 10 ms 23832 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 11 ms 23840 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23824 KB Output is correct
14 Correct 11 ms 23832 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23828 KB Output is correct
17 Correct 10 ms 23832 KB Output is correct
18 Correct 10 ms 23764 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 9 ms 23816 KB Output is correct
21 Correct 10 ms 23832 KB Output is correct
22 Correct 10 ms 23792 KB Output is correct
23 Correct 10 ms 23848 KB Output is correct
24 Correct 10 ms 23836 KB Output is correct
25 Correct 11 ms 23832 KB Output is correct
26 Correct 13 ms 24268 KB Output is correct
27 Correct 14 ms 24340 KB Output is correct
28 Correct 12 ms 24404 KB Output is correct
29 Correct 12 ms 24404 KB Output is correct
30 Correct 13 ms 24276 KB Output is correct
31 Correct 12 ms 23844 KB Output is correct
32 Correct 13 ms 24480 KB Output is correct
33 Correct 11 ms 23820 KB Output is correct
34 Correct 12 ms 24284 KB Output is correct
35 Correct 12 ms 24292 KB Output is correct
36 Correct 12 ms 24276 KB Output is correct
37 Correct 12 ms 24276 KB Output is correct
38 Correct 12 ms 23824 KB Output is correct
39 Correct 13 ms 24276 KB Output is correct
40 Correct 12 ms 24280 KB Output is correct
41 Correct 12 ms 24216 KB Output is correct
42 Correct 12 ms 24276 KB Output is correct
43 Correct 12 ms 24540 KB Output is correct
44 Correct 11 ms 23764 KB Output is correct
45 Correct 12 ms 24356 KB Output is correct
46 Correct 15 ms 24276 KB Output is correct
47 Correct 11 ms 23844 KB Output is correct
48 Correct 12 ms 24268 KB Output is correct
49 Correct 12 ms 24360 KB Output is correct
50 Correct 12 ms 24404 KB Output is correct
51 Correct 13 ms 24288 KB Output is correct
52 Correct 13 ms 24228 KB Output is correct
53 Correct 14 ms 24352 KB Output is correct
54 Correct 13 ms 24276 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 11 ms 23836 KB Output is correct
4 Correct 11 ms 23788 KB Output is correct
5 Correct 11 ms 23832 KB Output is correct
6 Correct 10 ms 23832 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 11 ms 23840 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23824 KB Output is correct
14 Correct 11 ms 23832 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23828 KB Output is correct
17 Correct 10 ms 23832 KB Output is correct
18 Correct 10 ms 23764 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 9 ms 23816 KB Output is correct
21 Correct 10 ms 23832 KB Output is correct
22 Correct 10 ms 23792 KB Output is correct
23 Correct 10 ms 23848 KB Output is correct
24 Correct 10 ms 23836 KB Output is correct
25 Correct 10 ms 23764 KB Output is correct
26 Correct 53 ms 38708 KB Output is correct
27 Correct 82 ms 38436 KB Output is correct
28 Correct 13 ms 24224 KB Output is correct
29 Correct 11 ms 23764 KB Output is correct
30 Correct 11 ms 23832 KB Output is correct
31 Correct 68 ms 38404 KB Output is correct
32 Correct 13 ms 24244 KB Output is correct
33 Correct 86 ms 45600 KB Output is correct
34 Correct 67 ms 38380 KB Output is correct
35 Correct 12 ms 24228 KB Output is correct
36 Correct 75 ms 39008 KB Output is correct
37 Correct 13 ms 24184 KB Output is correct
38 Correct 13 ms 24272 KB Output is correct
39 Correct 69 ms 38580 KB Output is correct
40 Correct 13 ms 24484 KB Output is correct
41 Correct 69 ms 38288 KB Output is correct
42 Correct 79 ms 40732 KB Output is correct
43 Correct 12 ms 23764 KB Output is correct
44 Correct 88 ms 45728 KB Output is correct
45 Correct 80 ms 42068 KB Output is correct
46 Correct 13 ms 24276 KB Output is correct
47 Correct 13 ms 24224 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 37288 KB Output is correct
2 Correct 57 ms 40988 KB Output is correct
3 Correct 13 ms 24324 KB Output is correct
4 Correct 13 ms 24232 KB Output is correct
5 Correct 12 ms 23764 KB Output is correct
6 Correct 11 ms 23828 KB Output is correct
7 Correct 13 ms 24228 KB Output is correct
8 Correct 109 ms 40336 KB Output is correct
9 Correct 15 ms 24288 KB Output is correct
10 Correct 76 ms 38584 KB Output is correct
11 Correct 13 ms 23860 KB Output is correct
12 Correct 76 ms 38440 KB Output is correct
13 Correct 93 ms 40200 KB Output is correct
14 Correct 72 ms 42500 KB Output is correct
15 Correct 58 ms 38616 KB Output is correct
16 Correct 14 ms 24236 KB Output is correct
17 Correct 12 ms 23872 KB Output is correct
18 Correct 64 ms 42284 KB Output is correct
19 Correct 82 ms 46368 KB Output is correct
20 Correct 14 ms 24232 KB Output is correct
21 Correct 12 ms 23864 KB Output is correct
22 Correct 66 ms 40524 KB Output is correct
23 Correct 14 ms 24224 KB Output is correct
24 Correct 81 ms 38992 KB Output is correct
25 Correct 79 ms 44992 KB Output is correct
26 Correct 15 ms 24404 KB Output is correct
27 Correct 14 ms 24356 KB Output is correct
28 Correct 15 ms 24308 KB Output is correct
29 Correct 13 ms 24224 KB Output is correct
30 Correct 13 ms 24284 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23764 KB Output is correct
2 Correct 10 ms 23764 KB Output is correct
3 Correct 11 ms 23836 KB Output is correct
4 Correct 11 ms 23788 KB Output is correct
5 Correct 11 ms 23832 KB Output is correct
6 Correct 10 ms 23832 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 11 ms 23764 KB Output is correct
9 Correct 11 ms 23764 KB Output is correct
10 Correct 11 ms 23840 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 11 ms 23764 KB Output is correct
13 Correct 12 ms 23824 KB Output is correct
14 Correct 11 ms 23832 KB Output is correct
15 Correct 11 ms 23764 KB Output is correct
16 Correct 11 ms 23828 KB Output is correct
17 Correct 10 ms 23832 KB Output is correct
18 Correct 10 ms 23764 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 9 ms 23816 KB Output is correct
21 Correct 10 ms 23832 KB Output is correct
22 Correct 10 ms 23792 KB Output is correct
23 Correct 10 ms 23848 KB Output is correct
24 Correct 10 ms 23836 KB Output is correct
25 Correct 11 ms 23832 KB Output is correct
26 Correct 13 ms 24268 KB Output is correct
27 Correct 14 ms 24340 KB Output is correct
28 Correct 12 ms 24404 KB Output is correct
29 Correct 12 ms 24404 KB Output is correct
30 Correct 13 ms 24276 KB Output is correct
31 Correct 12 ms 23844 KB Output is correct
32 Correct 13 ms 24480 KB Output is correct
33 Correct 11 ms 23820 KB Output is correct
34 Correct 12 ms 24284 KB Output is correct
35 Correct 12 ms 24292 KB Output is correct
36 Correct 12 ms 24276 KB Output is correct
37 Correct 12 ms 24276 KB Output is correct
38 Correct 12 ms 23824 KB Output is correct
39 Correct 13 ms 24276 KB Output is correct
40 Correct 12 ms 24280 KB Output is correct
41 Correct 12 ms 24216 KB Output is correct
42 Correct 12 ms 24276 KB Output is correct
43 Correct 12 ms 24540 KB Output is correct
44 Correct 11 ms 23764 KB Output is correct
45 Correct 12 ms 24356 KB Output is correct
46 Correct 15 ms 24276 KB Output is correct
47 Correct 11 ms 23844 KB Output is correct
48 Correct 12 ms 24268 KB Output is correct
49 Correct 12 ms 24360 KB Output is correct
50 Correct 12 ms 24404 KB Output is correct
51 Correct 13 ms 24288 KB Output is correct
52 Correct 13 ms 24228 KB Output is correct
53 Correct 14 ms 24352 KB Output is correct
54 Correct 13 ms 24276 KB Output is correct
55 Correct 10 ms 23764 KB Output is correct
56 Correct 53 ms 38708 KB Output is correct
57 Correct 82 ms 38436 KB Output is correct
58 Correct 13 ms 24224 KB Output is correct
59 Correct 11 ms 23764 KB Output is correct
60 Correct 11 ms 23832 KB Output is correct
61 Correct 68 ms 38404 KB Output is correct
62 Correct 13 ms 24244 KB Output is correct
63 Correct 86 ms 45600 KB Output is correct
64 Correct 67 ms 38380 KB Output is correct
65 Correct 12 ms 24228 KB Output is correct
66 Correct 75 ms 39008 KB Output is correct
67 Correct 13 ms 24184 KB Output is correct
68 Correct 13 ms 24272 KB Output is correct
69 Correct 69 ms 38580 KB Output is correct
70 Correct 13 ms 24484 KB Output is correct
71 Correct 69 ms 38288 KB Output is correct
72 Correct 79 ms 40732 KB Output is correct
73 Correct 12 ms 23764 KB Output is correct
74 Correct 88 ms 45728 KB Output is correct
75 Correct 80 ms 42068 KB Output is correct
76 Correct 13 ms 24276 KB Output is correct
77 Correct 13 ms 24224 KB Output is correct
78 Correct 52 ms 37288 KB Output is correct
79 Correct 57 ms 40988 KB Output is correct
80 Correct 13 ms 24324 KB Output is correct
81 Correct 13 ms 24232 KB Output is correct
82 Correct 12 ms 23764 KB Output is correct
83 Correct 11 ms 23828 KB Output is correct
84 Correct 13 ms 24228 KB Output is correct
85 Correct 109 ms 40336 KB Output is correct
86 Correct 15 ms 24288 KB Output is correct
87 Correct 76 ms 38584 KB Output is correct
88 Correct 13 ms 23860 KB Output is correct
89 Correct 76 ms 38440 KB Output is correct
90 Correct 93 ms 40200 KB Output is correct
91 Correct 72 ms 42500 KB Output is correct
92 Correct 58 ms 38616 KB Output is correct
93 Correct 14 ms 24236 KB Output is correct
94 Correct 12 ms 23872 KB Output is correct
95 Correct 64 ms 42284 KB Output is correct
96 Correct 82 ms 46368 KB Output is correct
97 Correct 14 ms 24232 KB Output is correct
98 Correct 12 ms 23864 KB Output is correct
99 Correct 66 ms 40524 KB Output is correct
100 Correct 14 ms 24224 KB Output is correct
101 Correct 81 ms 38992 KB Output is correct
102 Correct 79 ms 44992 KB Output is correct
103 Correct 15 ms 24404 KB Output is correct
104 Correct 14 ms 24356 KB Output is correct
105 Correct 15 ms 24308 KB Output is correct
106 Correct 13 ms 24224 KB Output is correct
107 Correct 13 ms 24284 KB Output is correct
108 Correct 497 ms 107116 KB Output is correct
109 Correct 771 ms 114592 KB Output is correct
110 Correct 823 ms 125908 KB Output is correct
111 Correct 752 ms 141424 KB Output is correct
112 Correct 748 ms 131636 KB Output is correct
113 Correct 439 ms 117704 KB Output is correct
114 Correct 602 ms 96716 KB Output is correct
115 Correct 560 ms 96680 KB Output is correct
116 Correct 707 ms 102504 KB Output is correct
117 Correct 555 ms 118412 KB Output is correct
118 Correct 595 ms 97272 KB Output is correct
119 Correct 559 ms 118324 KB Output is correct
120 Correct 668 ms 132388 KB Output is correct
121 Correct 594 ms 118444 KB Output is correct
122 Correct 717 ms 109776 KB Output is correct
123 Correct 405 ms 119912 KB Output is correct
124 Correct 729 ms 116356 KB Output is correct